Medium-term Wall Assembly for Shed conversion to occasional camp/cabin use
Bought a property with existing shed with 2×4 walls with (from outside to inside) vinyl siding/tar paper/osb then open to the inside. Zone 4/5 (Northern Shenandoah Valley) with electricity only (no plumbing planned). 12×16, 1.5 level, gambrel roof. Eventually, when the vinyl siding is closer to the end of its useful life & I have more of a budget for a larger renovation, I’m thinking to pull the siding and the tarpaper in order to housewrap then rigid foam (4″?), then re-side with vinyl and, as far as the interior of the sheathing, probably address the 2×4 voids with mineral wool and maybe a smart vapor retarder like Membrain, then “faux tongue and groove” plywood panels for inside wall covering. For now though, is there anything I can do to make the shed/cabin do better for climate control when we’re there on the weekends? (a couple weekends per month). What about double bubble foil wrapping horizontally across all the interior studs, taping those seams, then running a small dehumidifier constantly? Seems to me attempting mineral wool in stud wall, at this point, could cause problems with moisture since the r-value would be insufficient to keep moisture out/keep it dry until I am ready to do the foamboards on the exterior of the sheathing. Thoughts?
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